Charging base



FIG. 1 is a front view of a charging base showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top, front perspective view thereof.

The shade lines in the Figures show contour and not surface ornamentation. 

CLAIM The ornamental design for a charging base, as shown and described. 